D01L8B Datasheet, PDF (9/10 Pages) Frequency Devices, Inc. – 32-Pin DIP 8-, 6-, 4-Pole Filters

Low-Pass
Appendix A
6-Pole
Butterworth
Theoretical Transfer Characteristics
f/fc
Amp Phase Delay1
(Hz) (dB) (deg) (sec)
0.00 0.00
0.00 .615
0.10
0.00
-22.2
.617
0.20
0.00
-44.5
.624
0.30
0.00
-67.2
.637
0.40
0.00
-90.4
.656
0.50 -0.001 -115
.685
0.60 -0.009 -140
.731
0.70 -0.060 -167
.803
0.80 -0.289 -198
.911
0.85 -0.578 -215
.970
0.90 -1.080 -233
1.02
Frequency Response
0
-20
-40
-60
-80
-100
0.1
2 3 4 5 6 78 _1.0 2 3 4 5 6 7 _10.0
Normalized Frequency(f/fc)
0.95 -1.88 -252
1.03
1.00 -3.01 -270
1.00
1.10 -6.17 -304
.845
1.20 -9.96 -331
.660
1.30 -13.9 -352
.518
Delay (Normalized)
2.0
1.40 -17.6 -368
.417
1.50 -21.2 -382
.345
1.60 -24.5 -393
.291
1.70 -27.7 -403
.251
1.80 -30.6 -412
.219
1.0
1.90 -33.5 -419
.193
2.00 -36.1 -425
.171
2.25 -42.3 -439
.132
2.50 -47.8 -450
.105
2.75 -52.7 -458
.086
3.00 -57.3 -465
.071
3.25 -61.4 -471
.060
3.50 -65.3 -476
.052
4.00 -72.2 -484
.039
5.00 -83.9 -496
.025
0.0
0.1 ^{0.15 2}
3 4 5 6 7 8 9_1.0 1.5
Normalized Time (1/f sec)
Step Response
6.00 -93.4 -503
.017
1.2
7.00 -101
8.00 -108
-508
-512
.012
.0097
1.0
9.00 -115
10.0 -120
-515
-518
.0076
.0062
0.8
0.6
0.4
0.2
1.Normalized Group Delay:
-0.0
The above delay data is normalized to a corner frequency
of 1.0Hz.The actual delay is the normalized delay divided
0
1
2
3
4
5
by the actual corner frequency (fc).
Normalized Delay
Actual Delay =
Actual Corner Frequency (fc) in Hz
Normalized Time (1/f sec)
8
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